409459398490997 has 2 divisors, whose sum is σ = 409459398490998. Its totient is φ = 409459398490996.

The previous prime is 409459398490979. The next prime is 409459398491069. The reversal of 409459398490997 is 799094893954904.

Together with previous prime (409459398490979) it forms an Ormiston pair, because they use the same digits, order apart.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 311712937295236 + 97746461195761 = 17655394^2 + 9886681^2 .

It is a cyclic number.

It is not a de Polignac number, because 409459398490997 - 2¹⁶ = 409459398425461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (409459398490927) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (31) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 204729699245498 + 204729699245499.

It is an arithmetic number, because the mean of its divisors is an integer number (204729699245499).

Almost surely, 2^{409459398490997} is an apocalyptic number.

It is an amenable number.

409459398490997 is a deficient number, since it is larger than the sum of its proper divisors (1).

409459398490997 is an equidigital number, since it uses as much as digits as its factorization.

409459398490997 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 28570268160, while the sum is 89.

The spelling of 409459398490997 in words is "four hundred nine trillion, four hundred fifty-nine billion, three hundred ninety-eight million, four hundred ninety thousand, nine hundred ninety-seven".